The trace element composition of silicate inclusions in diamonds: a review

Stachel, Thomas; Aulbach, Sonja; Brey, Gerhard P.; Harris, Jeff W.; Leost, Ingrid; Tappert, Ralf; Viljoen, K.S.

doi:10.1016/j.lithos.2004.03.027

Cited by 193 publications

(121 citation statements)

References 63 publications

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“…N-type REE N patterns. Second, the remaining G9 REE N patterns are moderately to strongly sinusoidal, similar to those in lherzolitic inclusions in diamonds reported by Stachel et al (2004), and overlapping completely with the Lentiira-Kuhmo G10 grains in (Nd/Dy) N (Fig. 8).…”

Section: Lentiira-kuhmosupporting

confidence: 76%

Mantle transect of the Karelian Craton from margin to core based on P-T data from garnet and clinopyroxene xenocrysts in kimberlites

Lehtonen¹,

O’Brien²

2009

Bull Geol Soc Finland

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Peridotitic garnet and clinopyroxene xenocrysts from the 1.2 Ga Lentiira-Kuhmo and the 760 Ma Kuusamo kimberlite fields, emplaced within the Central Karelian Craton, have been studied using major and trace element geochemistry to obtain information on the stratigraphy, compositional variability, and evolutionary history of the underlying lithospheric mantle. An earlier study on the 600 Ma Kaavi-Kuopio kimberlite field showed that near the SW margin of the craton the 230-km-thick subcontinental lithospheric mantle (SCLM) exhibits a well-developed 3-layer structure indicative of episodic construction.

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Section: Lentiira-kuhmosupporting

confidence: 76%

Mantle transect of the Karelian Craton from margin to core based on P-T data from garnet and clinopyroxene xenocrysts in kimberlites

Lehtonen¹,

O’Brien²

2009

Bull Geol Soc Finland

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“…By configuration of garnet patterns of Udachnaya pipe are comparable with some samples from peridotite xenoliths of South African kimberlite from Jagersfontein, Kimberley, Lourensia, Premier ( Fig. 1-4, 5,7,8) and some other occurrences ( Fig. 1-9, 10,11,12).…”

Section: Garnetssupporting

confidence: 73%

“…In general, the garnets that are present in diamond microinclusions from peridotite xenoliths are usually divided into two paragenetic types that to a certain extent differ in Ca content: harzburgite and lherzolite. In harzburgite parageneses samples the content of CaO varies in the range of~0-6 wt %, which is considerably less than in the garnets from the microinclusions of lherzolite parageneses (5-8.6 wt %) [8]. Nevertheless, both types of garnets are almost identical by a total level of REE accumula-tion, as well as by the configuration of REE pattern, and both show a generally sinusoidal shape in REE pattern.…”

Section: Inclusions In Diamondsmentioning

confidence: 93%

Consistent patterns of rare earth element distribution in accessory minerals from rocks of mafic-ultramafic complexes

Lesnov

2013

Open Geosciences

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This paper summarizes analytical data accumulated in the world literature and other materials about the regularities of the REE distribution in minerals contained in ultramafic and mafic rocks as accessory phases. These minerals are tentatively divided into two groups. The first includes garnets, zircons, apatites and perovskites, which can accumulate increased amounts of REE in their structure. The second consists of minerals whose structure can accumulate only limited contents of these trace elements. These are chrome-spinels, ilmenites, and micas. These minerals, in respect of REE geochemistry, are studied to a varying degree because of the different levels of accumulations of these elements, different degrees of occurrence in rocks, tiny sizes of their grains and other reasons. The analytical database formed on their basis includes about 600 original analyses. The overwhelming majority of presently available data on REE geochemistry in accessory minerals from ultramafic and mafic rocks have been published only in the recent 15 years. The studies became possible due to the development and introduction of new highly sensible microprobe analyses allowing detection of REE and many other trace elements in minerals grains directly in thin sections. The greatest numbers of these analyses were performed for garnets and zircons, fewer for apatites, and the fewest for chrome-spinels, ilmenites, micas, and perovskites. In general, the regularities of REE distribution in these minerals from ultramafic and mafic rocks are less studied compared to the rock-forming minerals from ultramafic and mafic rocks. Among the analytical methods, which were used to study the REE composition of accessory minerals, the most efficient was the mass-spectrometry with inductively coupled plasma (ICP-MS).Keywords: REE distribution • ultramafic and mafic rocks • accessory minerals © Versita Sp. z o.o.

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“…The percentage of harzburgitic pyrope (G10) varies within the range of 6-17% and is highest in the 'K' area samples and lowest in the 'S' area samples. The percentage of pyrope with a diamond association (DA, i.e., high-chromium G9 and G10 pyrope [28][29][30]) is relatively high in the 'K' area samples (30%), moderate in the 'L' and 'P' area samples (21% and 17%, respectively), and relatively low in the 'S' area samples (11%). CaO-rich wehrlitic pyrope (G12) is present in samples from all areas and varies within the range of 2-10%.…”

Section: Pyropementioning

confidence: 99%

“…[27]. Diamond association, high-chromium G9 and G10 pyrope [28][29][30]; N, number of grains analyzed. (E) Mg# vs. Cr 2 O 3 , lherzolites of the ADP diamondiferous kimberlites [11,30,35,37,38,43].…”

Section: Cr-diopsidementioning

confidence: 99%

Diamond Exploration Potential of the Northern East European Platform

Shchukina

Shchukin²

2018

Minerals

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Abstract:In this study, we assess the diamond exploration potential of the northern East European Platform based on aeromagnetic survey results and the morphologic and geochemical analysis of 1513 grains of kimberlite indicator minerals (KIMs), such as purple pyrope garnet, olivine, and Cr-diopside. These minerals were recovered from samples collected from modern river and stream sediments in four areas located in the north-eastern (within the Arkhangelsk Diamondiferous Province) and south-western (hundreds of kilometers outside of the Arkhangelsk Diamondiferous Province) parts of the Arkhangelsk region in the European part of Russia. All the studied areas are located within ancient cratons, including the Kola, Karelian, and Shenkursk cratons. Based on the major element compositions of the KIMs and thermobarometric calculations, this study confirms that the lithospheric mantle beneath the studied areas is suitable for the formation and preservation of diamonds. The high percentage of KIMs with primary magmatic grain surface morphologies is evidence of the presence of local kimberlite sources within all of the studied areas. The significant amount of diamond-associated KIMs indicates that the potential sources are diamondiferous. Hence, the results suggest that the studied areas can be recommended for further diamond prospecting activity with a high probability of discovering new diamondiferous kimberlites.

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The trace element composition of silicate inclusions in diamonds: a review

Cited by 193 publications

References 63 publications

Mantle transect of the Karelian Craton from margin to core based on P-T data from garnet and clinopyroxene xenocrysts in kimberlites

Mantle transect of the Karelian Craton from margin to core based on P-T data from garnet and clinopyroxene xenocrysts in kimberlites

Consistent patterns of rare earth element distribution in accessory minerals from rocks of mafic-ultramafic complexes

Diamond Exploration Potential of the Northern East European Platform

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